Related Experiment Video
Updated: Jul 11, 2026
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Reverse Total Shoulder Arthroplasty
Published on: July 5, 2011
[The dislocated shoulder prosthesis--an avoidable disaster?].
J Hausdorf1, M Pietschmann, V Jansson
1Klinik für Orthopädie der Ludwig-Maximilians-Universität München, München, Deutschland. joerg.hausdorf@med.uni-muenchen.de
Der Orthopade
|September 29, 2007
Summary
Shoulder arthroplasty instability, often vertical or horizontal, can be prevented by precise preoperative planning and surgical restoration of the original bone and soft tissue anatomy. Careful attention to bony alignment and rotator cuff repair minimizes complications like dislocation and loosening.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Context:
- Shoulder arthroplasty is a common procedure for debilitating shoulder conditions.
- Instability remains a significant complication, impacting patient outcomes.
- Distinguishing between vertical and horizontal instability is crucial for management.
Purpose:
- To highlight the importance of preoperative planning and surgical technique in preventing shoulder arthroplasty instability.
- To differentiate between vertical and horizontal instability and their respective management strategies.
- To emphasize the critical role of restoring native anatomy in both bone and soft tissues.
Summary:
- Instability after shoulder arthroplasty, though dislocations are rare, presents as vertical (humeral head migration) or horizontal (eccentric glenoid loading).
- Preventing instability necessitates meticulous preoperative assessment (CT/MRI) and surgical reproduction of the pre-arthritic bony anatomy, including glenoid reorientation and torsion correction.
- Adequate soft tissue management, involving careful rotator cuff and capsule repair, is equally vital for successful outcomes.
Impact:
- Improved surgical techniques can reduce the incidence of shoulder arthroplasty instability.
- Accurate anatomical reconstruction leads to better implant longevity and function.
- Understanding instability mechanisms guides the selection of appropriate revision strategies, such as inverse prostheses for severe rotator cuff insufficiency.